Concrete-form.



ALOIS NEUBERT, 0F SAN FRANCISCO, CALFQRNI.

CONCRETE-FORM.

Specification of Letters Patent.

Patented Feb. 17,1914.

Application led May 4, 19-12. Serial No. 685,077.

To QU whom, t may concern Be it known that l, ALoIs NEUBERT, a subject of the Emperor of Austria-Hungary, residing at San Francisco, in the county of San Francisco and State of California, have invented new and useful Improvements in Concrete-Forms, of which the following is a specification.

The present invention relates to improvements in concrete forms, such as are used for forming concrete mantels, casings, or shells around driven and capped piles, for protection of the same against teredoes and other marine organisms, the object of the invention is to provide such forms, which, although of uniform size and shape may be connected together in various ways so as to form co-ncrete casings or shells of many different varieties, and which unit forms may be readily removed after being used, and may be used many times in succession.

In the accompanying drawing, Figure l is an inside view of a unit form; Fig. 2 is a side view thereof; Fig. 3 is an end View there` of; Fig. 4 is an enlarged sectional View on the line 4 4 of Fig. 2; showing the pin in position; Fig. 5 is a perspective View of a complete form; Fig. 6 is a plan view of a concrete form of different shape from that shown in Fig. 5.

The unit of my improved concrete form comprises a board l, preferably of about l inch in thickness, l2 inches in width and 24 inches in height. The upper and lower edges 2, 3, thereof are beveled in the same direction, or parallel with each other, so that an upper circular series of such units forming one tier of a complete form may lit within a lower similar series, forming another tier thereof and in this manner a succession of such series or tiers can be extended to any height required. Said unit also comprises two cross pieces 4 permanently secured by any suitable means to one side of said board l, at substantially equal distances from the top and bottom, which cross pieces converge toward each other at an angle of about 200, and extend beyond each vertical edge of the board for a distance of about 3 inches. These cross pieces 4f not only provide means for securing the units to-gether, as hereinafter described, but materially strengthen said units, so that the boards l may be made of considerable less thickness than would otherwise be the case. The ver tical edges of the board are beveled, or slope y inwardly toward the side remote from said cross pieces, at an angle of of a right angle.

I will first describe the use of. my improved unit forms for making an octagonal shell of concrete around a pile or the like, as this is the form in which the units can be used in the simplest manner, and will then describe the use of said units for making concrete forms of other shapes. Eight of these forms are arranged in circular series with the cross pieces on the outside and converging all in the same rotational tangential direction, so that the nearer ends of the cross pieces of one unit pass between the more remote ends of the cross pieces of an adjacent unit. TEach cross piece is formed, close to each vertical side ofthe board to which it is attached, with a vertical hole 5, of about one-half of an inch in diameter, and in the plane of the beveled edge as clearly shown in Fig. 3. lVhen the units are in the posit-ion above described, the hole through the higher end of the upper cross piece of one unit will be almost, but not exactly, above the hole through the lower end of the upper cross piece of an adjacent unit. When in this position a pin 6 is passed through the upper hole. This pin is formed with upper and lower portions 7, S, which are parallel with, but slightly offset from, each other by an intermediate portion'. 9. The pin is also formed with a part l0 extending from the top substantially at right angles thereto and serving as a handle or lever Vl1. rlChe pin is about three-eighths of an inch in thickness and this difference between the thickness of the pin and width of the hole, namely, l in. is sufficient to allow the bent or offset portion 9 of the pin to pass through into the upper hole at the same time that the lower straight portion S passes into the lower hole. ln the same way pins (3 are passed through all the pairs of holes both of the upper and of the lower cross pieces. The pins are then turned through one-half of a revolution or as much thereof as is necessary to draw the units together, so that they are tightly joined along their beveled edges. These holes are so arranged that, if the unit forms are properly constructed, an octagonal form will be made with tight fitting joints, but, if not, then by turning the pins in the proper direct-ion, they will be drawn tigthly to one another. By turning the pins in the opposite direction to that in which they ioo would be turned to draw the units t-ightly and using seven units, a heptagonal form may be obtained. A nonagonal form may be obtained by inserting compressible material as spun yarn between every second pair of beveled edges; 4a decagonal form by inserting compressible material between every pair of beveled edges; and forms of a great-er number ci' sides by increasing the thickness of the compressible material. It will be seen that by varying the number of such forms or boards l, the size of the casing or shell can be varied as' desired. It a shell of small diameter is required a small number of such unit -terms or boards are placed together, and of larger diameter then more units forms or boards are arranged in polygonal form. The assembling` of the units requires no particular care or attention, as they are interchangeable with one another and are secured together merely by dropping the pins 6 in the holes 5.

Fig. 6 illustrates the use of the unit forms for making a concrete shell around two piles which are so close together that it is impract-icable to make separate shells around lower sides respectively of like extending cross pieces of adjacent forms, the extending portions of each cross piece having therethrough vertical perforations adjacent to said edges.

In testimony whereof have hereunto set my hand in the presence of two subscribing witnesses.

ALOIS NEUBERT.

Witnesses FRANCIS M. lWnierrr, D. B. RICHARDS.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner or Patents,

Washington, D. C. 

